Apparatus for application of salts of radium.



lATENTED DEC. 18, 1906.

H. FARMS. APPARATUS FOR APPLICATION OF S'ALTS or RADIUM.

APPLICATION FILED FEB. 23, 1905.

2 sasm's-snsm 1.

No. 839,061. PATENTED DEC. 18, 1906.

H. FARJAS. APPARATUS FOR APPLICATION OF SALTS 0P RADIUM.

APPLICATION FILED FEB. 23, 1905.

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To all whorrt it may concern:

Be it known that I, HENRI FARJAS, engineer, a citizen of the French Republic, residing at 13 Rue Vignon, Paris, France, have invented certain new and useful Improvements in Apparatus for the Application of the Saltsof Radium and other Radio-Active Substances, of which the following is a specification.

For the utilization of the salts of radium and other radio-active substances, more especially for medical purposes, such substances are inclosed in a receptacle of glass, ebonite, celluloid, aluminium, or the like. Notwithstanding, however, that the walls of said vessels are made as thin as possible, the radiation is diminished to a considerable extent by the screen thus interposed. For example, with a wall of 0.1 millimeter of aluminium the ,loss is abort. ninety cent. With a wall of 0.3 millinie r of 'te the loss is also ninety per cent. Gris .ikewise causes a large loss. a In addition to this loss by: the emplgyment of such vessels the [i and y rays 0 y are utilized, and the efl'ect oi the 01 rays, which. would appear to resent the greatest bactericide effect, is tota ly lost.

From the foregoing it follows that it is ex 1 ceeclingly' desirable to dispense with the the bottom 2 of which may be covered with radio-active substance maintained in place by means of an appropriate cement;

The following are, among others, two methods which may be einployedz The bottom of the holder may be coated with a war nish which is dusted while still liquid, with radio-active matter reduced to a line powder,

or the radiaactive substance i'nay be'placed in a mortar with a few drops of creasing varnish and crushed until it forms a soft ,"dItSlJ-S,

Specification of Letters Patent. Application filed Iehrnazy 28, 1905- Serial No. 246,903,

Patented has is, ieoe.

which is' applied by means upon the bottom of the holder.

It will of course be understood that-other Q similar means may be employed. The two;

methods mentioned above are indicated caluse they have been found. to give good 115-. su ts.

In this manner theIradio-active substance is protected from the air or separated therefrom by a coat of varnish so thin thatlthe whole of the rays or almost the whole of them may be utilized.

when the high activities are employed.

In this way it is possible to efiect economies in thecost of the radio-5 active substance or to obtain a greaterefiect";

cidents of all kinds, the holder limay be covered with a washer of canvas 3 orof metallic gauze the meshes of which are-say, two

millimeters wide and whichjis maintained place by a ring 4, fixed by a screw 5, Fig.2.,

The holder 1 ma also be covered with' a metal cap 6, provi ed with holes or sl1ts, Fig.-3.'

Owing to the relatively large dimensions of the meshes, holes, or slits, the activity of the 3 substance is hardly diminished.

The holder may be screw-threaded: l

at its lower part, as shown in Fig.4, in such-a manner as to adapt t to be screwed onto a handle or at various parts of its perl hery,

Fig. 5, for the reception of an eye 7 orits The holder may vary in form in accord.

ance with the purpose for which the apps," ratus 1s intended. it may be round, over,

square,rectangular,cylindricahdcc. In cases in which is cylind ricel it is provided with slits, as shown in Big, 6;, A sheet ofpa or covered with a coat of radium is engage in the cylinder, the coated side being directed I outward. Cotton is stuffed the cylinder in order to maintain the ca er a liedagainst the wall. The cylinder ma also present internal ribs 1 1, Fig. 7 which 5 ightly loo separate the paper from the wall. 'lhe slits should be as narrow and as close togetheras possible, as the appliance is intended-in this case to be introduced into cavities, andthe ribs within these cavities. If particles of material become detached from the .aper, they remain inside the c 'lindcr, as t iis latter is generally utilized in a vertical position. The screw-plug 12, which is replaced by a handle when the appliance is in use for operations,

closes the extremity of the cylinder. The holder may also be in three parts, Figs. 8 to 11, a central disk, Fig. 8, a washer provided with a perforated bottom, Fig. 9, and a protecting-cap, Fig. 10.

The central disk 13 is solid and screw threaded at its periphery. On one side it carries a cylindrical tube 1+1, and upon theother side the radioactive substance is fired by means of an appropriate varnish. It screws into the washer 15, the bottom of which is perforated. This bottom may, however, dispensed with. .The washer is inilled, as at 16, and is provided with scrowthreads permitting of screwing it into the cap 17",. lhis latter used during transpoit that is to say, Wluin the apparatus is disposed as show u in Fig. ll-in order to prevent the radio-active substance from c mitting dangerous rays. Owing to its thickness, the disk 13 produces the same effect.

Owing to the arrangement adopted, the dish. 13 is able to screw to a greater or less ex tent into the washer (with or without a perforated bottom) in such a manner that the radioactive substance is brought nearer to or Farther away from the part to ,be treated. By dispensing with the washer 15 the disk 18 may even be applied to this part either directiy on with the interposition of a sheet of paper orlsome other more or permeable screen. The appliance may be applied to the part be treated either by hand, by the intermediary of the cylindrical tube Ml, or by means of a handle engaged. in this tube, or, finally, by means of a flexible coi'inection tra'versingythe "tube. The dish 13 may also be carried by two arms 18, Fig. 12, each provided EVltlIl llltrunnion 19, entering the tube ll. The arms are connected by a screw 20 to a rod 221, \l. oh the operator holds in his hand. The disl desired position and even elleet a complete revolution around the trunnions it In order to cause the radio-active substances to act at the bottom of cavities of small diamet -r, this substance is fixed to the extremity c a solid cylinder 213. i 2' which screw-ed to the extremity oi a metal handle or GXl-QDHlOa'l c 24.

an For transiiort the liudcr 22 screwed inl o the plug 225, which is itself screwed into the l'iandlo 25%. The milled stud ll) screwed at the ext-rent ity oi tl i sleeve 25-} in place oi. the extensionpiooo :34, or oi the i lindor 212. 'll'he handle .23 ol' Hint toicluiess to obviate any dau locrous unit. The cylinder may r 13 may also occupy any cancer.

revent the fall of radio-active material 1 bereplaced by a solid sphere 27, Fig 14, car

rying the radio-active substancefixed to its periphery.

When it is desired to treat,'for example, the mucous membranes of the mouth or throat, the radio-actiye substance is fixed to a plate 28, oscillating around a spindle 29 and carried. by. atube 30. This latter during the operation is partially engagedin the extremity of a handle 31 and held by a set-screw 32, Figs. 15 and '16. Owing to the oscillation of the plate 28 and to the rotation given to the apparatus by the o orator, the radio-active substance may be p aced so as to act upon a surface occupying any position.

For transport the rod 30 is en aged in the handle 31 and likewise held by t io screw 32. The handle for the reception of the plate 28 presents a cavity of appropriate form, which is covered by a lid 33,Which may be fitted by forcing it tight] in if the handle is of wood. If this hair le 31 is of metal, the lid 33 is longer than in the foregoing case and screws upon it. The portion of the handle that surrounds the plate may then. be dispensed with.

In these appliances sulfate of radium is employed in preference to the broinid or chlorid.

What I claim, and desire to secure by Letters Patent of the United States, is-- 1. in apparatus for the application of salts of radium and other radioactive substances a holder having the interior thereof coated Witha radio- Lethe substance and provided with a permeable protecting-screon substan' tially as specified.

2. In apparatus for the application of salts of radium and other radio'active substances, the combination with a holder having the interior thereof coated with a rz'ulio-acli'vc substance, a permeable protecting screen or handle to the holder suliistantially as and for the purpose specified. i

4-. ln. apparatus for the application of salts ol' radium and other radio-active substances, a holder having the interior thereof coated with a radio-active substance, a pernical'ile protcctin -screen, and means for attaching said screen to the holder, in combination with means for attaching the device to any (l uod point substantially as and for the pm'posc spcciliied.

in, apparatus for the application of salts of radium and other radio-active substances,

In testimony whereof I have hereunto set a perforated holder for the radio-active submy hand, in presence of two subscribing wit- 1'0 stance and a permeable protecting-screen.

6. I11 apparatus for the application of salts of radium and other radio-active substances, a holder for the radio-active substance havl ing perforati'oris, and means for detachably connecting a supporting device.

; nesses, this 6th day of February, 1905.

Witnesses:

PAUL UQULOMB, GASTON Fmmgors. 

